Lithium Hydroxide → (S)-2-(tert-butoxy)-2-(4-(4,4-dimethylpiperidin-1-yl)-2,6-dimethyl-5-(4-phenoxyphenyl)pyridin-3-yl)acetic acid

HRID 718422Notes

Reaction equation

HRID 718422 reaction equation
[C:1]([O:5][C@@H:6]([C:12]1[C:13]([CH3:40])=[N:14][C:15]([CH3:39])=[C:16]([C:26]2[CH:31]=[CH:30][C:29]([O:32][C:33]3[CH:38]=[CH:37][CH:36]=[CH:35][CH:34]=3)=[CH:28][CH:27]=2)[C:17]=1[N:18]1[CH2:23][CH2:22][C:21]([CH3:25])([CH3:24])[CH2:20][CH2:19]1)[C:7]([O:9]CC)=[O:8])([CH3:4])([CH3:3])[CH3:2].[Li+].[OH-]>CCO.O>[C:1]([O:5][C@@H:6]([C:12]1[C:13]([CH3:40])=[N:14][C:15]([CH3:39])=[C:16]([C:26]2[CH:31]=[CH:30][C:29]([O:32][C:33]3[CH:34]=[CH:35][CH:36]=[CH:37][CH:38]=3)=[CH:28][CH:27]=2)[C:17]=1[N:18]1[CH2:19][CH2:20][C:21]([CH3:25])([CH3:24])[CH2:22][CH2:23]1)[C:7]([OH:9])=[O:8])([CH3:4])([CH3:2])[CH3:3]

Participants

4

Reactant 2

HCID 3939Lithium HydroxideHCID 118314201(S)-ethyl 2-(tert-butoxy)-2-(4-(4,4-dimethylpiperidin-1-yl)-2,6-dimethyl-5-(4-phenoxyphenyl)pyridin-3-yl)acetate

Product 1

HCID 118307861(S)-2-(tert-butoxy)-2-(4-(4,4-dimethylpiperidin-1-yl)-2,6-dimethyl-5-(4-phenoxyphenyl)pyridin-3-yl)acetic acidYield 89.7%

Reagents, catalysts & solvents 1

HCID 19096565Water ethanolSolvent

Procedure

A mixture of (S)-ethyl 2-(tert-butoxy)-2-(4-(4,4-dimethylpiperidin-1-yl)-2,6-dimethyl-5-(4-phenoxyphenyl)pyridin-3-yl)acetate (0.016 g, 0.029 mmol) and LiOH (7.03 mg, 0.294 mmol) in 9:1 EtOH/H2O (2 mL) was refluxed for 4 h. The, cooled and purified by prep-HPLC to afford (S)-2-(tert-butoxy)-2-(4-(4,4-dimethylpiperidin-1-yl)-2,6-dimethyl-5-(4-phenoxyphenyl)pyridin-3-yl)acetic acid (0.0132 g, 0.026 mmol, 87% yield) as solid. 1H NMR (500 MHz, CDCl3) δ 7.35-7.40 (m, 2H), 7.22-7.27 (m, 1H), 7.08-7.18 (m, 4H), 7.03-7.08 (m, 2H), 6.01 (br. s., 1H), 3.35-3.70 (m, 1H), 2.80-3.08 (m, 1H), 2.65 (s, 3H), 2.28-2.38 (m, 1H), 2.26 (s, 3H), 2.06-2.21 (m, 1H), 1.18-1.42 (m, 4H), 1.26 (s, 9H), 0.82 (br.s., 3H), 0.75 (br.s., 3H). LCMS (M+H)=517.4.

Workup

  1. temperaturewas refluxed for 4 h
  2. temperatureThe, cooled
  3. custompurified by prep-HPLC

Sources & evidence

ORD record
ord-87388b5fb3274005a23f5654e736d7df
Source dataset
uspto-grants-2015_11
Patent number
US09193720B2

Reaction notes

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